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(No Model.)

B. VON BULTZINGSLOWEN.

y POCKET KNIFE. No. 472,104. Patented Apr. 5, 1892.

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07am/JM ,13. By we@ A7TOHNEY.

NITED STATES PATENT OFFICE.'

BRUNO VON BLTZINGSLVEN, OF NEW YORK, N. Y., ASSIGNOR OF ONE-HALF TO MAXRODDING, OF SAME PLACE.

POCKET-KNIFE.

SPECIFICATION forming part of Letters Patent No. 472,104, dated April 5,1892.

Application filed December 29, 1891. Serial No. 416.478. (No model.)

To @ZZ whom t may concern.-

Beit known that I, BRUNO voN BLTZINGS- LWEN, a citizen of the UnitedStates, and a resident of New York, in the county of New York and Stateof New York, have invented certain new and useful Improvements inPocket-Knives, of which the following is a specification.

My invention has reference to improvements in pocket-knives or handlesfor surgical instruments; and the invention consists of a handle forknife-blades, surgical instruments, and the like which incloses theknife-blade in a reliable manner and can be opened by a pressure uponthe spring-acting frame in such a way that the blade is drawn out andthen kept hold of by jaws at the open end of the frame, so that theblade can be handled for use.

In the accompanying drawings, Figures l and 2 are front views of myimproved pocket-- knife when closedg'and Fig. 3 is a front view of thesame when opened, one of the covering-plates being removed. Fig. 4 is aback View of lthe covering-plate. Figs. 5 and 6 are longitudinalsections of the pocket-knife with one and two blades, respectively.Figs. 7 and 8 are modifications, and Figs. 9 and 10 represent the frameof the handle.

Similar letters of reference indicate corresponding parts.

The main parts of my improved pocketknives are the frame B, Fig. 9,- thecoveringplates P P, and the blade K. The frame is formed of a U-shapedmetal strap B, the free ends of which are inwardly bent so as to formjaws b b. The inner shank portions B of the frame are somewhat thinner,so that they receive a certain spring action. The upper portions of theframe are cut off in line fr, Fig. 9, whereby two separate links b b areformed,which links are provided with holes for the plate-pins and bentatA their thinner ends so as to form inwardly-projecting hooks o o, asclearly shown in Fig. l0. The covering or side plates Pare at theirinner surfaces provided with guide-grooves u and are riveted to theframe-strap B in the usual manner. The links b b are likewise riveted tothe said side plates by means of pivot-pins n n in such' a manner thatthe hooks o o .are located over the ends of the frame-Shanks B B', andby the jaws' b b an opening for the knife-blade is formed. The blade isprovided at its base portion with a guide-pin r, projecting on bothsides, and with lateral notches lc. Before the covering-plates P areriveted to the framestrap the blade is placed between the shanks of thesaid frame-strap, so that when the plates are fastened to the latter thepin r slides in the guide-grooves of the said plates. When thepocket-knife is to be used, the hook-shaped ends o of the links b, andsimultaneously therewith the shank ends of the frame-strap B, arepressed down, whereby the jaws b of the said links are moved apart andthe opening of the handle is widened, as shown in Fig. 2, so that theblade K, which before was kept within the handle by the jaws b, isallowed to drop out until the slide-pin ris caught bythe end of theguide-grooves rt of the plates P. The hooks o are then released from thepressure and the jaws b moved inwardly by the spring action of theshanks Bexerted on the hooked ends of the links b, so that the jaws bengage the notches 7c of the blade and keep the same in reliableposition for use. Vhen the knife is to be closed, the hooks o arepressed down again and the notches la of the blade released from thejaws of the links b, so that the blade drops into the handle. The hooksare then released again from the pressure and the jaws moved inwardly,whereby the blade is prevented from dropping out of the handle.

Instead of a knife-blade a button-hook S may be used, which maybeprovided with one notch instead of two notches. In this case only onelink bis used, which actsin the same manner as described before. If thepocketknife has two blades, an intermediate partition-plate A is usedwithin the handle and the blades placed between the said partition-plateand the respective covering-plates. The links b are then pivoted to thehandle in opposite position, as shown in Figs. 6 and 7, and the bladesso arranged that the same drop out of the openings at the opposite endsof the handle. Of course the handle can be made without the bladesinclosed in the same. In this case the guide-grooves on thecovering-plates are omitted and the blades are inserted into the handleby widening the opening formed IOC by the jaws b in the mannerdescribed, and the notches of the blade are taken hold of by the saidjaws, as described before. Th ese handles are specially adapted forsurgical in struments, so that one handle can be used for instruments ofdifferent shapes and purposes.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. A handle for pocket-knives, consisting of aU-shaped frame-strap, covering-plates fastened to the frame-strap, andlinks with inwardly-bent jaws pivoted to the coveringplates and pressingagainst the Shanks of the frame-strap, in combination with a knifebladeor anyother blade havin glateral notches to be engaged by theinwardly-bent jaws of the aforesaid links, substantially as set forth.

2. In a pocket-knife, the combination of a hollow handle the covering orside plates of which are provided with guide-grooves, with linksprovided with inwardly-extendingjaws pivoted to the covering-plates andpressing against the shanks of the eut-off metallic U- shapcdframe-strap of the handle, and a blade having pins which slide in theguide-grooves of the covering-plates and being provided with lateralnotches to be engaged by the inwardly-bent jaws of the aforesaid links,substantially as set forth.

3. A handle for pocket-knives, consisting of U-shaped metallicframe-straps having one shank cut off, an intermediate plate placedbetween the said frame-straps, covering-plates having guide-grooves andbeing fastened to the frame-straps so that the intermediate plate isinclosed in the handle, and links with inwardly-bent jaws pivoted to thecoveringplates and the intermediate plate and pressing against theeut-off Shanks of the framestraps, in combination with knife or otherblades having pins which slide in the guidegrooves of thecovering-plates and notches to be engaged by the inwardly-bent jaws ofthe aforesaid links, substantially as set forth.

Signed at New York, in the county of New York and State of New York,this 5th day of December, A. D. 1891. n

BRUNO VON lSUL'IZINGSLOWEN. Vitnesses:

CHARLES KAR?, AIARTIN B. AUDELFINGEP..

